Cameraria ohridella
In 3 days ~70% in a week ~90%
The horse-chestnut leaf miner (Cameraria ohridella) is a leaf-mining moth of the family Gracillariidae. The horse-chestnut leaf miner was first observed in North Macedonia in 1984, and was described as a new species in 1986. Its larvae are leaf miners on the common horse-chestnut (Aesculus hippocastanum). The horse-chestnut leafminer was first collected and inadvertently pressed in herbarium sheets by the botanist Theodor von Heldreich in central Greece in 1879.
Cameraria ohridella causes significant damage, mainly late summer browning, to the appearance of horse-chestnut trees. Despite the poor appearance of these infested trees, there is no evidence that damage by the moth leads to tree death. Seed weight, photosynthetic storage and reproductive capacity may however be reduced. Trees survive repeated infestations and re-flush normally in the following year. It appears that most of the damage caused by the moth occurs too late in the growing season to greatly affect tree performance. Consequently, there is no reason to fell and remove trees just because they are attacked by C. ohridella.
The larva feeds in a mine in the leaves of the tree, damaging the leaves and stunting... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Triglav National Park | 🇸🇮 Slovenia | |
| 2 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Kyiv | 🇺🇦 Ukraine | |
| 3 | Kharkiv | 🇺🇦 Ukraine | |
| 4 | London | 🇬🇧 United Kingdom | |
| 5 | Minsk | 🇧🇾 Belarus | |
| 6 | Sofia | 🇧🇬 Bulgaria | |
| 7 | Berlin | 🇩🇪 Germany | |
| 8 | Manchester | 🇬🇧 United Kingdom | |
| 9 | Warsaw | 🇵🇱 Poland | |
| 10 | Birmingham | 🇬🇧 United Kingdom |
Possible
About 30% of wildlife watchers report a Horse-Chestnut Leafminer sighting in Liverpool on a given day, based on 339 verified sightings from GBIF citizen-science data. It is the 34th most-seen of the 632 insects we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
August to October
In those months about 50% of wildlife watchers report a Horse-Chestnut Leafminer in Liverpool on a given day, against under 5% in December to March, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Horse-Chestnut Leafminer sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 33 cities where we can rate Horse-Chestnut Leafminer sightings, Liverpool has the highest daily chance: about 30%. Next come Kyiv (Ukraine, about 30%) and Kharkiv (Ukraine, about 20%).
Same family: Gracillariidae
The closest relatives of the Horse-Chestnut Leafminer that you can see in Liverpool (family Gracillariidae, Leaf Blotch Miner Moths) are Beech Midget (about 10%), Firethorn Leafminer (about 10%) and European Oak Leafminer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Horse-Chestnut Leafminer is recorded against all the insects logged in Liverpool (339 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
